Furnace.



G. GARRECHT.

FURNACE.

APPLICATION FILED APR. 14, 1913 Patented Feb. 17, 1914.

I 1 1 il ll y '1 MW) UNITED STATES PATENT OFFICE.

GEORGE GARRECHT, OF ST. LOUIS, MISSOURIQJASSIG-NOB TO HAYNES-LANGENBEBGMANUFACTURING COMPANY, OF ST. LOUIS, MISSOURI, A GGRPORATION OF HIS-sonar,

1 Specification. Letters Patent.

FURNACE.

Patented Feb. 17, 1914.

' This invention relates to furnaces and particularly to apparatus to beused in connection 'lih furnaces popularly known as hot air furnaces forhumldifying the air before it is introduced into the distributingsystem.

fire chambplr B.

' s in the form An object of the invention is to produce an apparatus ofthe type mentioned which will be automatic in action and which. Wlllsupply to the air heating chamber of the furnace a constant and steadysupply of va or or steam, which mixes with the air an is carried with itthroughout the "distributing system.

With this general object, and incidental features which will be obviousfrom the following disclosure, in view, I have designed and arranged theseveral coiiperating parts hereinafter more fully described, referencebeing made to the accompanying drawing in which-- Figure 1 is anelevation with a part of the difierent elements broken away, fullyillustrating the several parts in their preferred arrangementconstituting the present invention. Fig. 2 is a cross-section throughthe fire chamber of the furnace illustrating in detail the arrangementof the water heating unit.

In the embodiment of my inventionillustrated in the drawin A indicatesthe furnace "casing in which is located the drum or Within the drum orcombustion, chamber B is located the fire pot formed with side walls offire brick in the manner understood, and is adapted to contain a bed ofcoal or other suitable fuel. It will be understood, of course, that theheat from the fire pot radiates from the 'drumhnd heatsthe air which isintroduced within the casing from any suitable source, and that the airthus heated is ponducted from the casing through the an supply pipes G.In the embodiment shown ,1 have referred to employ a canopy top r of aninverted cone and assists 1 vdistributing the heated air, and in mix-- Ig therewith the vapor, in the manner here- I which I I fter more fully"disclosed.

lf or producin the va or which is to be mixed with the sated air Iprovide a tank I 1 which'is' located cxteriorly of the casing and isarranged to ontain water, which circulates through ahollow chamber orwater back 2 by means of the inlet and return pipes 3 and 4. The hollowchamber or water back 2 is arranged in the wall of the fire pot, asclearly shown in Fig. 2. The hollow chamber or water back 2 ispreferably made the same size and shape, with respect to'its outerdimensions, as a single fire brick employed in constructing the wall ofthe fire pots thus facilitating-the construction of the apparatus. Thusthe water contained within the tank 1 is heated and ives oii' aqueousvapor which rises from the tank and passes into the casing A through thepipe 5, which communicates with said tank 1 above the water line. Thepipe 5 is provided at its inner end with an upturned outlet passage 6,through which the vapor from the tank 1 is emitted into the casing A,preferably below the apex of the canop D. The vapor is thus distributedthrong lent the heatedair just as it enters the hot air distributingpipes C, forming a uniform mixture of air and moisture thereby producmghumidified air of the proper relative moisture, for distribution throughthe system.

In order to maintain a constant supply o't water within the tank 1, Iprovide a separate supply tank 7 which is connected by the p pe 8 withthe tank 1 and may be provided with a drain valve 9, for draining tanks1 and 7 when the apparatus is not in use. The tank 7 is kept constantlysupplied with water through the supply pipe 10 connected with anypermanent source of water supply, which pipe is controlled by a floatvalve of known construction indicated by ll, so that a predeterminedlevel of water may be constantly maintained within the tank '5 therebypreventing the level of the water in the tank It from falling below arequisite level.

From the foregoing description, the operation of the apparatus isevident and it will be apparent that it is simple and durable inconstruction and positive and automatic in'its operation, supplying'therequisite amount of moisture for producing the re uired humidity of theair which is distri uted through the heating system.

to limit*inyseli to the exact details shownv and described, but what Iclaim anddesire to secure by Letters Patent is:

- ,1. in combination with a furnace comprising a casing,-airdistributing pipes located near the upper art of said casing, a heat-mgdrum and a re pot, of a tank 10- ;pated exteriorly of said casing, awater back constituting a part oi the Wall of said fire pot, an inletand a return pipe between said tank and said Water back, a steam conduitcommunicating with said tank above the level of the Water containedtherein and extending into the upper end of said casing, a supply tank,apassage between said supply tank and said first-named tank, and a waterservice pipe automatically controlled by the level of Water in saidsupply tank for supplying water to said tank, substantially asspecified.

2. In combination with a furnace comprising a casing, air distributingpipes located near the upper art of said casing, a heating drum and a epot, of a tank located exteriorlyof said casing, a water backconstituting a part of the Wall of said fire tan located above the lineof liquid contained in said tank and leading from'said tank and pot aninlet and a return pipe between said k and said Water back, a steamconduit.

haying open communication with the interior of said casing, a supplytank, a passage between said supply tank and said firstnamed tank, aservice pipe extending Within and opening into said supply tank, a valvein said service pipe Within said tank, and a float lever actuated by thewater Within said supply tank for controlling said valve, substantiallyas specified,

3. In combination with a furnace comprising a casing, air distributingpipes located near the upper part of said casing, a heating drum and afire pot, of a tank adapted to contain a liquid and located exteriorlyof said casing, a Water back arranged to be; effected by the heatgenerated in said fire pot, an inlet and a return pipe between said tankand said Water back, a pipe constituting a conduit adapted to con ductvapor from said tank into said casing, a supply tank, a passage betweensaid supply tank and said first-named tank, a Water service pipe andautomatic ineans'ior controlling said Water service pipe, substantiallyas specified.

In Witness whereof, I have signed this specification in the presence oftwo subscrib.

ing witnesses.

GEORGE GARRECHT. Witnesses: l

R031. M. Wilson, L. C. KINGSLAD.

